From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5679B3659FD for ; Sun, 26 Apr 2026 14:43:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777214590; cv=none; b=REZ5SdgPyOt/gqCfg2Wkbf/e9GVA8HZK0HsYAtHfXSizlfjfjndYRbVWJQ+wZRd4XfMsM2RSL4K0prhrgNFFIkt2y1/KmiVKhpZtfR7S4hvR02xNiiPBwWCOo12RUbKM6EA1HlU0qgyCIAAoAoVtpdvP8uw0fjIKGsBB24hWLFQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777214590; c=relaxed/simple; bh=r6IW2Vxqif4eP3VQmis8+qHG2ez7xshZW7LUio3QdpI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eh0NVB8RgyUBwt3pHrfop0B9GCkvgUEgz7poE7o7Dt+irFoyy/ZKRSdhp7+8HpUsUyVqq78JThVD5SsfXTCFHURJ1hRLX5MEnnZ59IhT+Q3yVulXyEs0zkQdlKDJx38FyFducti4x67TZ4qxTjN6xnO34wTgGVBVKi5DeOrgHVI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=kLZgChtG; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kLZgChtG" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-488b150559bso74548225e9.1 for ; Sun, 26 Apr 2026 07:43:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1777214588; x=1777819388; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9s1WYxPrrvK/oJoRsHuHHnoI8/Jk8XB2HAvh4QuaKcQ=; b=kLZgChtGfuoe/1fxADWQr+ppuBG7DmX7oteFEIwJ2kQFt0g9FTasPFEpkMVd12FB1p FGo+EWVzli5rhzCWArXoBgXMvSoR0MYk5IMAy7soAj5B0jeHQ2fVdy9q0JusJk0Lllp2 3LVYyiuCr8+f9wgifaFQ0r3Q7FbOCzIFuce6t5eAn6u1XuYuV+0bqqWUmPbs3CEYIEnq 83l3uhLtuwd6Nt8ImkVTKxlOExHgWuOyjSxCTEePMuDRzpbQl0CtJ2vauN5jn5hxxILs 0GffxVEzUrB+z4WERTpFAHPKNE/yF85A6BTG9I3o+oG8ARKNmi2mGOp9cfdIMvs+OIq0 PNcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777214588; x=1777819388; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=9s1WYxPrrvK/oJoRsHuHHnoI8/Jk8XB2HAvh4QuaKcQ=; b=RFILuqqdHYRApzyzmgaDayeNe6JDVbs7w5qyQWArUXorkpT3Qds+3ZYnABeeUtxeuo NwrBZnYaXeNmelI/rNVPRQ+Nz3bMndRrZnwabRicVwAakhOwwAzkH1W93Jqs70FVtSLC UjTTMWM/4y69ANnEn5NnvbkCHFNc9pnu1Kj7hMAzFSCEe17JR2yE3WxMeuQ6kStA1K8E EBg90pffjSh+RSAaEuV8t6ECpWYguX/+LOTBPYTaGSanJghsfwMGpsRPX3jmRdpyUZUV XL/WZO7PLKkgWym010aH5yFnczqV99E5ol0w5unN5SET6D8LVfVk1dMSylfKDKy1V/Xf pOig== X-Forwarded-Encrypted: i=1; AFNElJ/ERYw5ONcUTFSQynZrx+xnC3/C9dZdZG4kQ9Vhs7iS46rSQa1Mghe8q/EwYkrVMO1Ec0zoFJ0qHBLUHpM=@vger.kernel.org X-Gm-Message-State: AOJu0YwwqLsPlVIPoEDzX+yXcwapTJae59IL7oPt8H9s2SyIfAnlkxHH e48j4NGe+EvXNiPEPePoax+CAUl+x4rv/HdCETfHe4ofVQ3Sw0g1YIMR X-Gm-Gg: AeBDievLImog27wokwYMnFiXY3dJcSIztinMlE5JtOVXd0wvpBKku0XzDuI1Z8lBV31 CI5sM+74/CtYLTKSrBYqd6ovr18SzYBQoQ44J79VpVNk2oba//nuT+j8NpVjd6RIAM1lVFcFUvn c00tApZutOI1YBoyTb4ajbN+/7IfxBhyo2JIitu0UAkt9MhrugPjW7NXX4iy1O/HfnSbHxM/B9+ OAB02PQv+AQZO1RlqffTUq962dJG3ToOCtibfma6flVQD2Q+LiyR7xN4y4aMY2QGRlXc6dNrz7I eariAfQVRv7yZgDeWiJw5tTULjCuX8rKuSzzXiCuMlN9ZmPFgpHplw32Aq4T7mLP5vXeNOWuOJ8 4Va1jlLgeQgjm84uwqh1+zTYttN5IhAAuIZ+RK/6LPJJpvTMtjSlUylh41SHbwC/G9fc8udQ/2e OpeY5EHG0bTp+mxBxNAbq9uvkgcsqM6DsgSNFEv4lChQiLuCqcuzYwRC5WGGZGIQoSFuzda5cWw 36MDdUxbLHrRqY= X-Received: by 2002:a05:600c:c10a:b0:483:2c98:4368 with SMTP id 5b1f17b1804b1-488fb771613mr428687215e9.18.1777214587716; Sun, 26 Apr 2026 07:43:07 -0700 (PDT) Received: from ubuntu-f6bvp (lfbn-idf1-1-366-193.w86-195.abo.wanadoo.fr. [86.195.82.193]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488fc18bccfsm658230335e9.8.2026.04.26.07.43.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 26 Apr 2026 07:43:07 -0700 (PDT) From: Bernard Pidoux To: netdev@vger.kernel.org Cc: linux-hams@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, Bernard Pidoux Subject: [PATCH net 1/5] rose: fix dev_put() leak in rose_loopback_timer() Date: Sun, 26 Apr 2026 16:43:01 +0200 Message-ID: <20260426144305.984349-2-bernard.f6bvp@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260426144305.984349-1-bernard.f6bvp@gmail.com> References: <20260426144305.984349-1-bernard.f6bvp@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit rose_rx_call_request() always consumes or returns the skb but never releases the device reference obtained from rose_dev_get(). When rose_rx_call_request() succeeds (returns non-zero) dev_put() was never called, leaking one reference per loopback CALL_REQUEST. Move dev_put() outside the conditional so it is called unconditionally after rose_rx_call_request() in all cases. Also remove the dead check (!rose_loopback_neigh->dev && !rose_loopback_neigh->loopback) that immediately precedes it: the loopback neighbour always has loopback=1 so this condition can never be true. Fixes: 0453c6824595 ("net/rose: fix unbound loop in rose_loopback_timer()") Tested-by: Bernard Pidoux Signed-off-by: Bernard Pidoux --- net/rose/rose_loopback.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/net/rose/rose_loopback.c b/net/rose/rose_loopback.c index b538e39b3df5..914c8f453a1d 100644 --- a/net/rose/rose_loopback.c +++ b/net/rose/rose_loopback.c @@ -96,22 +96,15 @@ static void rose_loopback_timer(struct timer_list *unused) } if (frametype == ROSE_CALL_REQUEST) { - if (!rose_loopback_neigh->dev && - !rose_loopback_neigh->loopback) { - kfree_skb(skb); - continue; - } - dev = rose_dev_get(dest); if (!dev) { kfree_skb(skb); continue; } - if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) { - dev_put(dev); + if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) kfree_skb(skb); - } + dev_put(dev); } else { kfree_skb(skb); } -- 2.51.0